28408379 has 2 divisors, whose sum is σ = 28408380. Its totient is φ = 28408378.

The previous prime is 28408349. The next prime is 28408397. The reversal of 28408379 is 97380482.

Together with next prime (28408397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28408379 - 2⁸ = 28408123 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28408319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14204189 + 14204190.

It is an arithmetic number, because the mean of its divisors is an integer number (14204190).

Almost surely, 2^28408379 is an apocalyptic number.

28408379 is a deficient number, since it is larger than the sum of its proper divisors (1).

28408379 is an equidigital number, since it uses as much as digits as its factorization.

28408379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 28408379 is about 5329.9511254795. The cubic root of 28408379 is about 305.1280623199.

The spelling of 28408379 in words is "twenty-eight million, four hundred eight thousand, three hundred seventy-nine".